Service difficulty report · Fitting · Boeing 7377H4

Difficulty date
February 10, 2020
Submitted
March 4, 2020
Operation
Air carrier
Aircraft
N426WN
Make and model
Boeing 7377H4
Aircraft serial
29830
Aircraft time
61,080 hours, 36,269 cycles
Part
Fitting
Part number
146A7730
Condition
Corroded
Location
Fuselage
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

***CORROSION*** ON KEEL BEAM CLIP COMMON TO VHF ANTENNA MOUNT BS 727D+9" FORWARD INBOARD STR 27L DUE TO BLUE WATER SPILL CORROSION FOUND OUT OF LIMITS DUE TO NO ALLOWABLE DAMAGE GIVEN IN SRM REMOVED CLIP FABRICATED FROM BAC1493-672T62 M#1370754-1, LOCATED, DRILLED, APPLIED CHEMICAL CONVERSION COATING PRIMED & INSTALLED PER DWG 146A7730 SRM 51-40-02-0G-0, AMM 51-21-41-370-802, AMM 51-21-72-370-804. FASTENERS COMMON TO KEEL BEAM TO BE INSTALLED ON CUSTOMER CARD U116483 SAM 326 A 1294210 BLOCK 8

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